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Revenue (Tables)
 9 Months Ended
Sep. 30, 2018
Revenue [Abstract]  
Disaggregation of Revenue The following table presents information on our disaggregated revenue.

REVENUE:
Three Months Ended
September 30
Nine Months Ended
September 30
Millions of dollars
2018
2017
2018
2017
Completion and Production
$
4,170

$
3,537

$
12,141

$
9,273

Drilling and Evaluation
2,002

1,907

5,918

5,407

Total revenue
$
6,172

$
5,444

$
18,059

$
14,680

 
 
 
 
 
By geographic region:
 
 
 
 
North America
$
3,739

$
3,163

$
11,090

$
8,164

Latin America
522

530

1,458

1,501

Europe/Africa/CIS
757

722

2,199

2,005

Middle East/Asia
1,154

1,029

3,312

3,010

Total revenue
$
6,172

$
5,444

$
18,059

$
14,680